The embodiments of the invention disclose a speech wake-up method and system, electronic equipment and a computer readable storage medium, and relates to the technical field of intelligent equipment. The method includes the steps that if the speech activity detection process detects that a speech signal collected by a microphone conforms to a first preset condition, a processor is triggered to read a data signal collected by a gravity sensor; according to the data signal, whether the speech signal is generated by speaking of a user wearing the electronic equipment or not is judged; if not, the speech signal is ignored; or if yes, the keyword recognition process is started, and if the speech signal is recognized to contain a preset speech instruction keyword, the electronic equipment is controlled to perform the corresponding function. According to the embodiments, energy consumption of the electronic equipment can be saved, the electronic equipment can be avoided being woken up by mistake; and in addition, no special bone-conduction microphone or other contact microphone is required, the cost is low, an algorithm is simple and practical, the accuracy is high, and consumed resources are few.